代码
提交代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="app">
<div> {{ count }} </div>
<div>
<button @click="increase">添加一次</button>
<button @click="decrease">减少一次</button>
</div>
</div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script type="text/javascript">
var vm = new Vue({
el: '#app',
data() {
return {
count: 0
}
},
methods: {
increase() {
this.count++
},
decrease() {
this.count--
}
}
})
</script>
</html>
运行结果